It's important to know how to handle this kind of conversations, and I think you did it just fine, letting her know that she didn't need to tag herself with a specific sexuality, and that it was okay to not just know.
Maybe she will "know" some day, and maybe she won't, and that's perfectly okay, and she can live happily in any of those situations because labels aren't a life or death thing- they're just concepts that, as you mentioned, can help us find our niche in an easier way.
I'm so glad you made this comment, I really appreciate it. Thank you so much <3
Thank you for the reassurance! The hardest thing about parenting (for me) is that even when you're trying to do it 'right' you never QUITE know for sure if you did it right. There is no year end review or report card!